Question

if 62.3 g of zinc react with hydrophosphoric acid (H3PO4) it produces zinc (I) phosphate and hydrogen. how much zinc (I) phosphate is produced?

Answer 1

I wonder why phosphoric acid is not as good as hydrophosphoric acid. Also, note that Zn is Zn(II) phosphate etc.
3Zn + 2H3PO4 ==> Zn3(PO4)2 + 3H2

mols Zn = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols Zn to mols Zn3(PO4)2.
Then g Zn3(PO4)2 = mols x molar mass = ?